/Engine/Plugins/MovieScene/MovieRenderPipeline/Source/MovieRenderPipelineCore/Public/Graph/MovieGraphSequenceDataSource.h
Called when the Movie Graph Pipeline starts before anything has happened, allowing you to cache your datasource before making any modifications to it as a result of rendering.
virtual void CacheDataPreJob ( const [FMovieGraphInitConfig](API\Plugins\MovieRenderPipelineCore\Graph\FMovieGraphInitConfig) & InInitConfig )